Temporal evolution of comet 67P/Churyumov-Gerasimenko's surface as observed by VIRTIS-M

We report about the seasonal evolution of 67P/Churyumov-Gerasimenko's surface as inferred from VIRTIS-Rosetta measurements. We analyze observations performed from August 2014, when the comet was at a heliocentric distance of 3.5 AU along the inbound part of the orbit, up to the end of the Rosetta mission in September 2016, when 67P was at 3.8 AU outbound.